libextractor: Add missing header

Fixes compilation with -Wimplicit-function-declaration

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/libextractor/patches/010-musl.patch

@@ -0,0 +1,13 @@
+diff --git a/src/common/le_architecture.h b/src/common/le_architecture.h
+index b863ddb..713acdd 100644
+--- a/src/common/le_architecture.h
++++ b/src/common/le_architecture.h
+@@ -26,6 +26,8 @@
+ 
+ #if WINDOWS
+ #include <sys/param.h>          /* #define BYTE_ORDER */
++#else
++#include <byteswap.h>
+ #endif
+ 
+ /* This is copied directly from GNUnet headers */